Give an example of each of the three types of relationships: unary, binary, and ternary.
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A: I attached an ER diagram of above whole scenario please have a look once.
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Q: Give an example of each of the three types of relationships: unary, binary, and ternary.
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- Draw the relationships and entities model for each of the following: * in the traditional way* for example: see the pic??. In the database of the library, the author can author more than one book, and the book can be subscribed toWritten by more than one authorUsing a graphics program, develop an entity-relationship diagram for a database application for an Internet bookstore where students buy textbooks from a salesperson and receive invoices for their purchases. Use Figure 5.5 as a guide.There are certain constraints imposed by selection structures in computer programming, notwithstanding their use. The same procedure must be followed in all cases, whether dealing with consumers, online clients, or other sorts of transactions. Is it true that various criteria apply to various occupations? So, why are these structures so special? There are certain constraints imposed by selection structures in computer programming, notwithstanding their use. The same procedure must be followed in all cases, whether dealing with consumers, online clients, or other sorts of transactions. Is it true that various criteria apply to various occupations? So, why are these structures so special? There are certain constraints imposed by selection structures in computer programming, notwithstanding their use. The same procedure must be followed in all cases, whether dealing with consumers, online clients, or other sorts of transactions. Is it true that various criteria apply to…
- Draw an ER diagram that captures the following information: A book identified by (unique Id number, a title and one or more authors), A library identified by (unique name and adders), A borrower has a name and a unique ID code. The library service may own several copies of a given book. A borrower can have many books on loan, but each copy of a book can only be on loan to one borrower. A borrower could borrow the same book on several occasions, but it is assumed that each such loan will take place on a different date. *Define Attribute interpolation.Study the following. A customer can place one or more orders, but an order belongs to only one customer. A customer is described by its name, delivery address, and contact number. While an order is described by order number, order status, and order date. Only one payment is made for an order. An order can be paid for through one of two options. A payment is either cash or debit. A payment has an amount attribute. Cash payment is described by cash tendered, while debit payment is described by number, type, and expiry date 6.1 Use the scenario to draw a UML class diagram.
- It's possible to have a main key and a candidate key for the same characteristic.Give some instances of relationships that may have more than one candidate key to consider.Suppose you are asked to design a club database system based on the following information. Each student has a unique student id, a name, and an email; each club has a unique club id, a name, a contact telephone number, and has exactly one student as its president. Each student can serve as a president in at most one of the clubs, although he/she can be the members of several clubs. Clubs organize activities and students can participate in any of them. Each activity is described by a unique activity id, a place, a date, a time and those clubs that organize it. If an activity is organized by more than one club, different clubs might contribute different activity fees.QuestionDraw an E-R diagram for the system according to the above description.
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